- A$\text{V}$
- B$\sqrt{\text{V}}$
- C$\text{T}$
- D$\sqrt{\text{T}}$
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An object 1 cm tall is placed 4cm infront of a mirror. In order to produce an upright image of 3cm height one needs a
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(a) Convex mirror of radius of curvature 12 cm |
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(b) Concave mirror of radius of curvature 12 cm |
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(c) Concave mirror of radius of curvature 4 cm |
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(d) Plane mirror of height 12 cm |
The solar constant on the surface of the earth is S. What will be its value on the surface of another planet which is about 5.3 A.U. away from sun
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(a) |
(b) |
(c) 5.3 S |
(d) (5.3)2 S |
Two Nicols are oriented with their principal planes making an angle of 60°. The percentage of incident unpolarized light which passes through the system is
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(a) 50% |
(b) 100% |
(c) 12.5% |
(d) 37.5% |
The bending of light as it passes from one medium into another is commonly known as:
In the experiment of diffraction at a single slit, if the slit width is decreased, the width of the central maximum
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(a) Increases in both Fresnel and Fraunhofer diffraction |
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(b) Decreases both in Fresnal and Fraunhofer diffraction |
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(c) Increases in Fresnel diffraction but decreases in Fraunhofer diffraction |
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(d) Decreases in Fresnel diffraction but increases is Fraunofer diffraction. |